EP 0293982 B1 19910313 - PROCESS FOR THE TREATMENT OF CONTAMINATED MINERAL MATERIALS
Title (en)
PROCESS FOR THE TREATMENT OF CONTAMINATED MINERAL MATERIALS
Publication
Application
Priority
DE 3718669 A 19870604
Abstract (en)
[origin: US4846083A] For the production of a product which can be dumped or utilized, the mineral substances are subjected in a rotary kiln to a thermal treatment at a temperature at which the charge of the rotary kiln is transformed to a pasty to liquid slag phase. The composition of the charge is so selected that a slag phase is produced in which the main components, which constitute a matrix, are in the range from 60 to 72% SiO2, 10 to 30% Al2O3 and 5 to 25% CaO+MgO, of said matrix, wherein the total percentage of SiO2+Al2O3+CaO+MgO equals 100, the total of the main components SiO2, Al2O3, CaO and MgO amounts to more than 60% on a dry and ignition loss-free basis, of the mineral matter which is charged to the rotary kiln. The slag phase discharged from the rotary kiln is cooled and the exhaust gas from the rotary kiln is purified.
IPC 1-7
IPC 8 full level
A62D 3/00 (2006.01); B01J 6/00 (2006.01); B09B 3/00 (2006.01); B09C 1/06 (2006.01); C02F 11/00 (2006.01); C04B 5/00 (2006.01); C04B 5/02 (2006.01); C04B 18/02 (2006.01); C04B 32/00 (2006.01)
CPC (source: EP US)
B09B 3/00 (2013.01 - EP US); B09B 3/29 (2022.01 - EP US); B09C 1/06 (2013.01 - EP US); B09C 1/067 (2013.01 - EP US); C02F 11/004 (2013.01 - EP US); C04B 18/023 (2013.01 - EP US); C04B 32/005 (2013.01 - EP US); Y02W 30/91 (2015.05 - EP US)
Designated contracting state (EPC)
BE DE GB IT NL SE
DOCDB simple family (publication)
EP 0293982 A1 19881207; EP 0293982 B1 19910313; DE 3718669 A1 19881215; DE 3861983 D1 19910418; FI 882639 A0 19880603; FI 882639 A 19881205; JP S63310691 A 19881219; NO 176312 B 19941205; NO 176312 C 19950315; NO 882388 D0 19880531; NO 882388 L 19881205; US 4846083 A 19890711
DOCDB simple family (application)
EP 88201072 A 19880530; DE 3718669 A 19870604; DE 3861983 T 19880530; FI 882639 A 19880603; JP 13825488 A 19880604; NO 882388 A 19880531; US 19699588 A 19880520